I actually added that after most of the price discussion (which now seems to have been voted to the bottom of the thread). I would really like to be able to say "pay as much as you want", but unfortunately the App Store doesn't support that. Overall, my goal is not to make a ton of money here. I just want to make as much as people want to give me, with other ways to get it if I don't.

(Again, though, I'm new to this: I'll definitely take your advice for the future, if I do another "open source but paid" app.)